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Friedreich's ataxia

Friedreich's ataxia is an autosomal recessive congenital ataxia that occurs rarely in the human population. It is caused by a mutation in Gene X25 that codes for frataxin, located on chromosome 9. It is named after Nikolaus Friedreich, a German doctor who described the disease in 1863. more...

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Delatycki et al. (2000) provided an overview of the clinical features, pathology, molecular genetics, and possible therapeutic options in Friedreich ataxia.

Friedreich's ataxia and muscular dystrophy, though often compared, are completely different diseases. Muscular dystrophy is the result of muscle tissue degeneration whereas Friedreich's ataxia is the result of nervous tissue degeneration (a trinucleotide repeat disorder). Both are researched by the Muscular Dystrophy Association.

Symptoms

Symptoms begin sometime between the age of 5 to 15 years. The symptoms can include any combination, but not necessarily all of:

  • Muscle weakness in the arms and legs
  • Loss of coordination
  • Vision impairment
  • Hearing loss
  • Slurred speech
  • Curvature of the spine (scoliosis)
  • Carbohydrate intolerance
  • Extreme heart conditions (eg, atrial fibrillation, and resultant tachycardia (fast heart rate) and cardiomyopathy (enlargement of the heart))

These symptoms are slow and progressive. Long-term observation shows that many patient's reach a plateau in symptoms in the patient's early adulthood. Because of many of these symptoms, a person suffering from Friedrich's Ataxia may require some surgical interventions (mainly for the spine and heart).Often a metal rod is inserted in the spine to help prevent or slow the progression of scoliosis. As progression occurs, assistive devices such as a cane or walker or a wheelchair are required for mobility (independence).

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LSU Researcher Receives NIH Grant to Study Causes of Friedreich's Ataxia
From PR Newswire, 10/20/05

NEW ORLEANS, Oct. 20 /PRNewswire/ -- Louisiana State University Health Sciences Center researcher Ed Grabczyk has been awarded a $485,000 grant from the National Institutes of Health for a three-year study designed to better understand the mechanisms causing Friedreich's ataxia (FRDA) and provide clues for possible therapies.

Mr. Grabczyk's research is entitled "Mechanisms Contributing to Frataxin Deficiency." He plans to examine Friedreich's ataxia at a basic molecular level focusing on how the FRDA repeat expansion lowers expression of the frataxin protein which is believed to be responsible for FRDA. His hypothesis is that at the molecular level transcription instigates dynamic structure formation within the GAA-TTC repeat that leads to reduced mRNA expression through multiple potential pathways.

"Once you define the mechanisms of Friedreich's ataxia then you have a line on pathways for therapy," said Grabczyk.

Grabczyk is a former NIH researcher who moved to New Orleans four years ago to study Friedreich's ataxia which has a higher incidence in the Acadian population living in Louisiana. He received two earlier grants from the Friedreich's Ataxia Research Alliance that served as a foundation for the current work being funded by NIH.

"Ed's research is fundamental to having a better understanding of Friedreich's ataxia," said Fraser Goodmurphy, who introduced Grabczyk to FARA. "Ed's work is immensely important and will be closely watched by researchers around the world."

This research could be essential to determining how the genetic mutation in Friedreich's ataxia severely reduces the production of the frataxin protein. Grabczyk expects to begin work under the NIH grant in early November. His research has been delayed by Hurricane Katrina which damaged equipment at LSU's Health Sciences Center in New Orleans and destroyed cell lines used in his research. He is in the process of recovering and recreating his earlier work.

There is no effective treatment or cure available for Friedreich's ataxia which is a hereditary disorder that often first becomes noticeable as a balance and coordination problem when children are in elementary school. Further loss of strength and coordination in all four extremities usually forces those with FRDA into wheelchairs by their teens, while the disorder impairs vision, hearing and speech as it progresses. It is frequently associated with severe heart disease, scoliosis, and diabetes. In the later stages of the disorder, patients are usually completely incapacitated, often dying of cardiac failure. Friedreich's ataxia, although rare, is the most prevalent inherited ataxia, affecting about 1 in every 50,000 people in the United States.

About FARA

The Friedreich's Ataxia Research Alliance (FARA) is a 501(c)(3), non- profit, charitable organization dedicated to accelerating research leading to treatments and cure for Friedreich's Ataxia (FRDA). http://www.faresearchalliance.org/

CONTACT: Ron Bartek, president of Friedreich's Ataxia Research Alliance, +1-703-413-4468

Web site: http://www.faresearchalliance.org/

COPYRIGHT 2005 PR Newswire Association LLC
COPYRIGHT 2005 Gale Group

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